BRUSSELS — EU leaders were ticking through their agenda items with alacrity on Thursday. Rumors were circulating they might even cancel Friday’s meeting, having nothing left to talk about. Then Viktor Orbán stepped in. Our approach to migration is unacceptable, the Hungarian leader fulminated. Exactly, echoed the Polish prime minister, Mateusz Morawiecki. We won’t move forward with the summit’s final statement until our concerns are addressed, they vowed. In the end, they got their way — kind of. The entire summit stalled as the leaders of France and Germany, plus European Council President Charles Michel, negotiated with Hungary and Poland. Eventually,…